Predictable grub drive number

rreignier New Member Posts: 61 ✭✭

On the UpBoard with the default BIOS and the latest UPC1DM17 version, the onboard eMMC appears as hd0 in Grub. But if I boot the board with a USB drive connected, the USB device becomes hd0 and eMMC hd1 so grub cannot find the partition to boot.
Changing the boot order in the BIOS does not change anything on this behavior.

On other x86 platform, it seems that BIOS boot priority influences the grub disk number (see the post here:

So could AAEON look into the BIOS settings if something could be changed to allow to keep eMMC as hd0 in Grub.